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To construct the missing parts of the two-way table, we can calculate the totals for each row and column based on the given data.
For the 7th graders:
- Can Swim: 15
- Cannot Swim: 60
- Total: 15 + 60 = 75
For the 8th graders:
- Can Swim: 65 (total can swim - 7th graders who can swim)
- Cannot Swim: 45
- Total: 65 + 45 = 110
Therefore, the completed two-way table would look like this:
Can Swim Cannot Swim Totals
7th Graders 15 60 75
8th Graders 65 45 110
Totals 80 105 185